TW201538030A - Light adjustable AC LED device - Google Patents

Abstract

A light adjustable AC LED device is provided. Color temperature of the AC LED device is varied with brightness of the AC LED device. The AC LED device includes an AC source, a plurality of electric loops and a plurality of LED segments. The AC source provides an AC voltage. Each electric loop is electrically connected to the Ac source. Each LED segment is electrically connected to each electrical loop. When the AC voltage is increased, each LED segment is brightened orderly so that color temperature of each LED segment is gradually overlapped. When the AC voltage is decreased, each LED segment is gone out orderly so that color temperature of each LED segment is gradually decreased.

Description

Dimmable AC light emitting diode device

A light-emitting diode device, in particular, a dimmable AC light-emitting diode device whose color temperature can be changed according to a change in brightness.

The luminous efficiency, energy consumption and life cycle of the LED are far superior to traditional incandescent bulbs. In view of the emphasis on energy issues, LEDs have gradually replaced the current trend of incandescent bulbs.

Generally, the light-emitting diode is directly driven by a direct current, or the alternating current is converted into a direct current through a power exchanger. The conversion efficiency of these power converters is quite low, which is easy to cause energy consumption in the driving process, and the driving mode of the power converter is also likely to cause problems such as high noise and unstable current. Furthermore, the current supply by the mains is an AC voltage, so it is necessary to drive the LEDs by AC voltage.

There are currently proposals for AC-driven light-emitting diode devices. However, due to the configuration of the circuit, the light emitted by the AC-driven LED device is limited in color temperature, brightness, and color modulation, and thus its illumination performance is still inferior to that of a conventional incandescent bulb.

Therefore, there is a need for an AC driven LED device that can Achieve similar or better than the traditional incandescent bulbs.

The invention provides a dimmable AC light emitting diode device. A plurality of power supply circuits are formed by the cooperation of the AC power source and the rectifier and through the function of the semiconductor control element. A separately controllable LED segment is formed in each of the power circuits. Thereby, when the dimmable AC light-emitting diode device emits light, each of the light-emitting diode segments can sequentially emit light, and the color temperature of the light-emitting color is sequentially superimposed with the increase of the brightness; When the diode device is extinguished, the light-emitting segments are sequentially extinguished in reverse order, and the color temperature of the light-emitting is sequentially decreased as the brightness is lowered. Thereby, a multi-stage additive or declining color temperature change can be formed to achieve a precise dimming effect.

An object of the present invention is to provide a dimmable AC light-emitting diode device whose color temperature becomes lower as its brightness decreases. The dimmable AC light-emitting diode device comprises an AC power source, a plurality of power circuits, and a plurality of light-emitting devices. Diode segment. The AC power source is used to provide an AC voltage. Each power supply circuit is electrically connected to an alternating current power source. Each of the light emitting diode segments is electrically connected to each power supply circuit. Wherein, when the AC voltage is gradually increased, the LED segments of each power supply circuit are sequentially illuminated, so that the color temperatures exhibited by the LED segments are sequentially superimposed and superimposed; when the AC voltage is gradually increased When descending, the respective LED segments of each power supply circuit are cut in reverse order.

The dimmable AC LED device described above further comprises a bridge rectifier. The bridge rectifier is electrically connected to the AC power source and rectified and exchanged The voltage reverses the negative half cycle of the AC voltage to form a full-wave rectified voltage. In addition, the dimmable AC LED device further includes a semiconductor control component having a ground terminal and a plurality of ports. The ground end is connected to one of the ports of the bridge rectifier, and the other port of the bridge rectifier is connected to one of the light emitting diode segments, and each port of the semiconductor control component is electrically connected to each of the light emitting diode segments. Form each power circuit.

Another object of the present invention is to provide a dimmable AC LED device whose color temperature varies with its brightness. The dimmable AC LED device includes an AC power source and a plurality of power circuits. Each of the power supply circuits respectively includes at least one light emitting diode unit to form a plurality of light emitting diode segments. The AC power source is used to provide an AC voltage. When the AC voltage gradually rises: the first LED segment is first illuminated to provide a first color temperature; the second LED segment is then illuminated to provide a second color temperature, at which time the first color temperature Mixing with the second color temperature to form a mixed color temperature; the third LED segment is then illuminated to provide a third color temperature, where the first color temperature, the second color temperature, and the third color temperature are mixed to form another mixed color temperature. Wherein the first color temperature is lower than or equal to the second color temperature, and the second color temperature is lower than or equal to the third color temperature. When the AC voltage gradually decreases: each of the LED segments is extinguished piece by piece in the reverse order.

The dimmable AC LED device further includes a bridge rectifier electrically connected to the AC power source and rectifying the AC voltage to reverse the negative half cycle of the AC voltage to form a full-wave rectified voltage. In addition, the dimmable AC LED device further includes a semiconductor control component having a ground terminal and a plurality of ports, the ground terminal and the bridge rectifier. One port is commonly connected to the ground, and the other port of the bridge rectifier is connected to a first LED segment. Each port of the semiconductor control component is electrically connected to each of the LED segments to form each power circuit. In addition, in the above-mentioned dimmable AC LED device, each of the LED segments can be placed together to form a COB type LED device having a plurality of LED segments.

A further object of the present invention is to provide a dimmable AC light-emitting diode device whose color temperature varies with brightness. The dimmable AC light-emitting diode device comprises an AC power source, a rectifier, and a plurality of LEDs. Body unit and a semiconductor control element. An AC power source is used to provide an AC voltage. The rectifier is electrically connected to the AC power source for rectifying the AC voltage and outputting a rectified voltage. The plurality of light emitting diode units receive the rectified voltages and are connected in series with each other to define a plurality of light emitting diode segments. One end of the semiconductor control element is connected to the ground, and the other end is electrically connected to each of the light-emitting diode sections to form a plurality of power supply circuits. When the AC voltage is gradually increased, the LED segments of each power supply circuit are sequentially illuminated, so that the color temperatures of the LED segments are sequentially superimposed and superimposed; when the AC voltage is gradually decreased Time: each of the light-emitting diode segments of each power supply circuit is sequentially cut, so that the color temperature exhibited by each of the light-emitting diode segments is sequentially reduced.

In the above dimmable AC LED device, the rectifier can be a bridge rectifier for rectifying the AC voltage to form a full-wave rectified voltage. Each of the light emitting diode segments may include one light emitting diode unit or more than one light emitting diode unit in series, and the light emitting diode unit may be a COB package. In addition, the dimmable AC LED device described above may further comprise a pair The dimming device is adjusted to adjust the brightness of each of the LED segments.

101‧‧‧AC power supply

102‧‧‧Bridge rectifier

Port 102a‧‧‧

102b‧‧‧port

103‧‧‧First power circuit

104‧‧‧Second power circuit

105‧‧‧ Third power circuit

106‧‧‧Semiconductor control components

201‧‧‧First LED section

202‧‧‧Second light-emitting diode section

203‧‧‧3rd LED segment

201a, 202a, 203a‧‧‧ input

201b, 202b, 203b‧‧‧ output

301‧‧‧First LED unit

302‧‧‧Second light-emitting diode unit

303‧‧‧3rd LED unit

T1‧‧‧First color temperature

T2‧‧‧second color temperature

T3‧‧‧ third color temperature

V1, V2, V3‧‧‧ drive voltage

S1‧‧‧ first port

S2‧‧‧ second port

S3‧‧‧ third port

GND‧‧‧ ground

FIG. 1 is a schematic circuit diagram of a dimmable AC light emitting diode device according to an embodiment of the invention.

FIG. 2 is a schematic diagram showing an operational state of a dimmable AC light-emitting diode device according to an embodiment of the invention.

FIG. 3 is a schematic view showing another operational state of the dimmable AC LED device according to an embodiment of the invention.

FIG. 4 is a schematic view showing an application mode of the dimmable AC light-emitting diode device of the present invention.

The operation of the various embodiments of the present invention will be described in the following. For the sake of clarity, a number of practical details will be described in the description. However, it should be understood that these practical details are not intended to limit the invention. That is, in some embodiments of the invention, these practical details are not necessary. In addition, some of the conventional structures and elements are shown in the drawings in a simplified schematic manner in order to simplify the drawings.

Please refer to FIG. 1 . FIG. 1 is a schematic circuit diagram of a dimmable AC LED device according to an embodiment of the invention.

In one circuit of the dimmable AC LED device, an AC power source 101, a bridge rectifier 102, and a first LED are included. The body segment 201, a second LED segment 202, and a third LED segment 203. An AC power source 101 is used to provide an AC voltage required for illumination of the dimmable AC LED device. The bridge rectifier 102 is electrically connected to the AC power source 101 for rectification. Through the rectification effect of the bridge rectifier 102, the negative half cycle of the AC voltage waveform generated by the AC power source 101 will be reversed to output a full-wave rectified voltage. A semiconductor control component 106 includes a ground terminal GND and at least three ports, which are a first port S1, a second port S2, and a third port S3, respectively. The ground terminal GND of the semiconductor control component 106 is connected to one of the ports 102a of the bridge rectifier 102, and the other port 102b of the bridge rectifier 102 is electrically connected to one of the input terminals of the first LED segment 201. 201a. The output terminal 201b of the first LED segment 201 is electrically connected to the first port S1 of the semiconductor control element 106. Thereby, the first power source circuit 103 is formed such that the first light emitting diode section 201 can be controlled to emit light.

The first light emitting diode section 201, the second light emitting diode section 202, and the third light emitting diode section 203 are formed in series with each other. The input terminal 202a of the second LED segment 202 is electrically connected to the first port S1 of the semiconductor control element 106, and the output terminal 202b of the second LED segment 202 is electrically connected to the semiconductor control device. The second port S102 of 106. Thereby, a second power supply loop 104 is formed such that the second LED segment 202 can be controlled to emit light. The input terminal 203a of the third LED segment 203 is electrically connected to the second port S2 of the semiconductor control component 106, and the output terminal 203b of the third LED segment 203 is electrically connected to the semiconductor control component. The third port of 106 is S3. Thereby forming a third power circuit 105, such that the third LED segment 203 can be controlled to emit light.

The first light-emitting diode segment 201, the second light-emitting diode segment 202, and the third light-emitting diode segment 203 may be connected in series by a single light-emitting diode unit or a plurality of light-emitting diode units. form. In detail, the first LED segment 201 may be formed by one or more LED units 301 connected in series, and the second LED segment 202 may be formed by one or more second LED units. The 302 is formed in series, and the third LED segment 203 can be formed by connecting one or more third LED units 303 in series.

The first light emitting diode unit 301, the second light emitting diode unit 302, and the third light emitting diode unit 303 can emit light of different colors. In one example, the first light emitting diode unit 301 is a red light emitting diode and has a first color temperature T1; the second light emitting diode unit 302 is a green light emitting diode and has a second color temperature. T2; and the third light emitting diode unit 303 is a blue light emitting diode and has a third color temperature T3.

Please refer to FIG. 2 and FIG. 3 . FIG. 2 is a schematic diagram showing the operation state of a dimmable AC LED device according to an embodiment of the invention. FIG. 3 is a schematic view showing another operational state of the dimmable AC LED device according to an embodiment of the invention. In the above-described dimmable AC light-emitting diode device circuit, the AC power source 101 is used for rectification in conjunction with the bridge rectifier 102, and the semiconductor power control element 106 is used to form the first power source circuit 103, the second power source circuit 104, and the The three power supply circuit 105 is configured to form a separate control for the first light emitting diode section 201, the second light emitting diode section 202, and the third light emitting diode section 203. At the 2nd In the figure, in the full-wave rectified voltage formed by the rectification of the AC power source 101 through the bridge rectifier 102, the driving voltage V1, the driving voltage V2, and the driving voltage V3 are sequentially generated and sequentially drive the first LED segments. 201. Illumination of the second LED segment 202 and the third LED segment 203.

In actual operation, as the AC voltage provided by the AC power source 101 continues to increase, the first LED segment 201 will be illuminated first, then the second LED segment 202 will be illuminated, and the third LED II The polar body section 203 is finally illuminated.

Thereby, the first light emitting diode unit 301 of the first light emitting diode section 201 is first illuminated to generate the first color temperature T1. Then, the second LED unit 302 of the second LED segment 202 is illuminated to generate a second color temperature T2, and finally the third LED unit 303 of the third LED segment 203 is Lights up to produce a third color temperature T3. The first color temperature T1 is lower than or equal to the second color temperature T2, and the second color temperature T2 is lower than or equal to the third color temperature T3.

In FIG. 3, as the AC voltage provided by the AC power source 101 continues to increase, at this time, the driving voltage V1 is supplied by the first power source circuit 103 and the first LED segment 201 is illuminated, and the first is generated. Color temperature T1. As the AC voltage continues to increase, the second power supply loop 104 provides the drive voltage V2 and illuminates the second LED segment 202 while producing a second color temperature T2. At this time, for the entire dimmable AC light-emitting diode device, as the brightness increases, the color of the light-emitting is the light-emitting color of the first light-emitting diode unit 301 of the first light-emitting diode segment 201. And the second light emitting diode The mixing of the illuminating colors of the second illuminating diode unit 302 of the segment 202; and the color temperature of the illuminating light is the sum of the first color temperature T1 and the second color temperature T2. If the AC voltage continues to increase, the third power supply circuit 105 supplies the driving voltage V3 and illuminates the third LED segment 203 while generating the second color temperature T2. At this time, the color of the entire dimmable AC LED device is the color of the first LED body 301 of the first LED segment 201, and the second LED segment 202. The color of the illuminating color of the second illuminating diode unit 302 and the illuminating color of the third illuminating diode unit 303 of the third illuminating diode section 203; and the color temperature of the illuminating color is the first color temperature T1 and the second color temperature The sum of T2 and the third color temperature T3. The first color temperature T1 is lower than or equal to the second color temperature T2, and the second color temperature T2 is lower than or equal to the third color temperature T3.

In one example, when the first light emitting diode unit 301 is a red light emitting diode, the second light emitting diode unit 302 is a green light emitting diode, and the third light emitting diode unit 303 is a In the case of the blue light emitting diode, the entire dimmable AC light emitting diode device emits white light having a dense color temperature as the AC voltage continues to increase by the above dimming mode. Moreover, the color, brightness and color temperature of the hair can be achieved in the same way as the current AC-driven incandescent bulb.

The above is the case where the AC voltage (lighting) is continuously increased. When the AC voltage provided by the AC power source 101 is gradually lowered, the third LED segment 203 is first cut, then the second LED segment 202 is cut, and finally the first LED region is cut. Segment 201 is cut. In the case where the AC voltage is continuously lowered (extinguished), the third color temperature T3 is first lowered, and then The second color temperature T2 is lowered, and finally the first color temperature T1 is lowered. In this way, when the light of the dimmable AC light-emitting diode device is extinguished, a dense color temperature distribution can also be exhibited.

Please refer to FIG. 4, which is a schematic diagram of one application of the dimmable AC light-emitting diode device of the present invention. In the dimmable AC light emitting diode device of FIG. 4, the first light emitting diode segment 201, the second light emitting diode segment 202, and the third light emitting diode segment 203 are used differently. Light emitting diode unit. Therefore, when the entire dimmable AC light-emitting diode device is lit, the color temperature gradually increases with the brightness, and when the entire dimmable AC light-emitting diode device is extinguished, the color temperature gradually decreases with the brightness. Effect. Thereby, the dense color temperature control can be achieved, and the illuminating color and brightness are more uniform.

In the above embodiments, the number of the LED segments is not limited. In actual use, it is also possible to use more than three power supply circuits combined with more than three light-emitting diode segments, thereby forming a more compact color temperature control, so that the illumination mode of the entire dimmable AC light-emitting diode device is closer to Traditional incandescent light bulbs. Moreover, the package type of the LED unit is not limited, and may be a COB package or other type. In one example, the dimmable AC LED device can further use a dimming dimmer to adjust the brightness of each of the LED segments to form a more precise dimming effect.

In summary, the present invention discloses a dimmable AC light emitting diode device. The color illuminating diodes are sequentially illuminated or sequentially extinguished, so that the color temperature of the dimmable luminescent diode device changes continuously with brightness to achieve a luminous effect similar to that of a conventional incandescent bulb.

101‧‧‧AC power supply

102‧‧‧Bridge rectifier

Port 102a‧‧‧

102b‧‧‧port

103‧‧‧First power circuit

104‧‧‧Second power circuit

105‧‧‧ Third power circuit

106‧‧‧Semiconductor control components

201‧‧‧First LED section

202‧‧‧Second light-emitting diode section

203‧‧‧3rd LED segment

201a, 202a, 203a‧‧‧ input

201b, 202b, 203b‧‧‧ output

301‧‧‧First LED unit

302‧‧‧Second light-emitting diode unit

303‧‧‧3rd LED unit

S1‧‧‧ first port

S2‧‧‧ second port

S3‧‧‧ third port

GND‧‧‧ ground

Claims (12)

A dimmable AC light-emitting diode device, wherein a color temperature of the dimmable AC light-emitting diode device becomes lower as a brightness of the light-emitting diode dimming device decreases, the dimmable AC light-emitting diode The device includes: an AC power source for providing an AC voltage; a plurality of power circuits, each of the power circuits being electrically connected to the AC power source; and a plurality of LED segments electrically connected to the power sources a loop; wherein, when the alternating voltage is gradually increased, each of the light-emitting diode segments of each of the power supply circuits is sequentially illuminated, so that the color temperature of each of the light-emitting diode segments is sequentially mixed when illuminated Superimposing; when the alternating voltage is gradually decreased, each of the light emitting diode segments of each of the power supply circuits is cut off in the reverse order. The tunable AC LED device of claim 1, further comprising a bridge rectifier electrically connected to the AC power source and rectifying the AC voltage to reverse the negative half cycle of the AC voltage A full wave rectified voltage is formed. The tunable AC LED device of claim 2, further comprising a semiconductor control component having a ground terminal and a plurality of ports connected to the ground of one of the bridge rectifiers The other port of the bridge rectifier is connected to one of the LED segments. Each of the ports of the semiconductor control component is electrically connected to each of the LED segments to form each of the power circuits. A dimmable AC light-emitting diode device, wherein a color temperature of the dimmable AC light-emitting diode device becomes lower as a brightness of the light-emitting diode dimming device decreases, the dimmable AC light-emitting diode The body device comprises: an AC power source for providing an AC voltage; and a plurality of power source circuits, each of the power source circuits respectively comprising at least one LED unit and respectively forming a plurality of LED segments, wherein: When the voltage gradually rises: the first LED segment is first illuminated to provide a first color temperature; the second LED segment is then illuminated to provide a second color temperature, at which time the first The color temperature is mixed with the second color temperature to form a mixed color temperature; and the third LED segment is then illuminated to provide a third color temperature, wherein the first color temperature, the second color temperature, and the third color temperature Mixing to form another mixed color temperature; wherein the first color temperature is lower than or equal to the second color temperature, the second color temperature is lower than or equal to the third color temperature; when the alternating voltage is gradually decreased: each of the light emitting diode segments On the contrary Piecewise sequence is extinguished. The tunable AC LED device of claim 4, further comprising a bridge rectifier electrically connected to the AC power source and rectifying the AC voltage to reverse the negative half cycle of the AC voltage A full wave rectified voltage is formed. The tunable AC LED device of claim 4, wherein each of the light-emitting diode segments is physically disposed together to form a COB-type light-emitting diode having a plurality of light-emitting diode segments Device. The tunable AC LED device of claim 5, further comprising a semiconductor control component having a ground terminal and a plurality of ports connected to the ground of one of the bridge rectifiers The other port of the bridge rectifier is connected to a first LED segment. Each of the ports of the semiconductor control component is electrically connected to each of the LED segments to form each of the power circuits. A dimmable AC light-emitting diode device, wherein a color temperature of the dimmable AC light-emitting diode device changes according to a brightness of the dimmable AC light-emitting diode device, and the dimmable AC light-emitting device The polar body device comprises: an AC power source for providing an AC voltage; a rectifier electrically connected to the AC power source for rectifying the AC voltage and outputting a rectified voltage; a plurality of LED units, the LEDs The polar body unit receives the rectified voltage and is connected in series with each other to define a plurality of LED segments; and a semiconductor control element, one end of which is connected to the ground, and the other end is electrically connected to the LED segments Connecting to form a plurality of power supply circuits; wherein when the alternating voltage is gradually increased, each of the light emitting diode segments of each of the power supply circuits is sequentially illuminated, so that each of the light emitting diode segments is illuminated The color temperature is sequentially superimposed and superimposed; When the AC voltage is gradually decreased, each of the LED segments of each of the power circuits is sequentially cut, so that the color temperature exhibited by each of the LED segments is sequentially reduced. The tunable AC LED device of claim 8, wherein the rectifier is a bridge rectifier for rectifying the AC voltage to form a full-wave rectified voltage. The dimmable AC LED device of claim 8, wherein each of the light emitting diode segments comprises a light emitting diode unit or more than one light emitting diode unit in series. The dimmable AC light emitting diode device of claim 9, wherein the light emitting diode unit is a COB package. The dimmable AC LED device of claim 8 further comprising a bidirectional control dimmer for adjusting the brightness of each of the LED segments.